Effect of some organic and bio-fertilizers on" Thompson seedless" grapevines under new reclaimed sandy soil

الملخص EN

During 2015 and 2016 seasons, thompson seedless grapevines were fertilized with organic fertilizer, compost, humic acid and bio fertilizer (ascophyliumnodosum) algae.

these fertilizers were used as a partial replacement for inorganic n fertilizer improving yield, lowering pollution and enhancing the efficiency of exportation to foreign markets.

the obtained results indicated that application of n as 50% inorganic n plus50% organic n and algae 5ml / vine was the best management system for ensuring the best yield, number of clusters /vine and cluster weight, leaf mineral content and improving the chemical characteristics of berries as total soluble solids (tss), total acidity(ta) and tss /acid ratio and decreasing nitrate and nitrite content in the berries.